JP2017196695A - Abrasive-grain saw blade - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform stable cutting by suppressing bending of a cut surface of a work even under a high load cutting condition where the cutting length of the work is longer or the feed rate of the abrasive grain band saw blade 10 is higher. SOLUTION: A plurality of first projecting portions 16 and a plurality of first projecting portions 16 in which an abrasive grain layer 14 is electrodeposited on one side edge portion of a base metal 12 along the circumferential direction and protrudes to both sides in the band thickness direction, respectively. The second protruding portions 18 of the above are formed at intervals in the circumferential direction, and a plurality of dividing portions 20 for dividing the abrasive grain layer 14 into a plurality of regions A are spaced apart in the circumferential direction on one side edge portion of the base metal 12. The ratio P2 / (P1 + P2) of the divided portion 20 is set to 0.2 to 17%. [Selection diagram] Fig. 1

Description

  The present invention relates to an abrasive band saw blade (electrodeposition band saw blade) used for cutting processing such as cutting or grooving of a workpiece made of, for example, quartz glass, optical glass, ceramics, or silicon.

  A general abrasive band saw blade that is widely used is composed of three types: a continuous type, a segment type, and a gear cutting type. In a continuous abrasive band saw blade, an abrasive layer containing abrasive grains such as diamond abrasive grains is formed on one side edge of the endless base metal over the entire circumference (the entire circumference of the abrasive band saw blade). Is continuously electrodeposited. In segment-type abrasive band saw blades, a plurality of segment abrasive layer layers containing abrasive grains are placed on one side edge of an endless base metal at intervals in the circumferential direction (circumferential direction of the abrasive band saw blade). It is worn. In a gear-cut type abrasive band saw blade, an abrasive layer containing abrasive grains is electrically connected to a plurality of teeth that are convexly formed at one side edge of an endless base metal at intervals in the circumferential direction. (See examples below).

  In a continuous abrasive band saw blade, the abrasive layer is continuously electrodeposited in a band shape over the entire circumference, and since the amount of abrasive grains is large, the cutting load on the abrasive grains per piece is high. Stable cutting can be performed with a small size while suppressing the falling off of the abrasive grains. However, there is almost no gap between the workpiece and the abrasive band saw blade during the cutting process, and a cutting fluid such as cutting oil is stably supplied between the workpiece and the abrasive band saw blade or the workpiece and the abrasive band saw. It is difficult to stably discharge chips from between the blades. As a result, under the cutting conditions where the workpiece cutting length is long or the feed rate of the abrasive band saw blade is high, the sharpness is lowered and the cut surface of the workpiece is bent.

  On the other hand, in segment-type abrasive band saw blades, the gap between the workpiece and the abrasive band saw blade is secured by separating the plurality of segment abrasive layer layers in the circumferential direction, thereby supplying cutting fluid and discharging chips. It is possible to improve the property and maintain a good sharpness. Similarly, in a gear-cutting type abrasive band saw blade, the gap between the workpiece and the abrasive band saw blade is ensured by the circumferential separation of a plurality of abrasive layers by gear cutting, thereby supplying cutting fluid. In addition, it is possible to maintain good sharpness by increasing the discharge of chips. However, in segment-type and gear-cut-type abrasive band saw blades, the amount of abrasive grains is small, and the cutting load applied to each abrasive grain is large. As a result, under the cutting conditions where the workpiece cutting length is long or the feed rate of the abrasive band saw blade is high, the abrasive grains fall off and the cut surface of the workpiece is bent.

  Then, instead of a general abrasive band saw blade, an abrasive band saw blade has been developed that can improve the supply of cutting fluid and the discharge of chips while suppressing the falling off of abrasive grains (see Patent Document 1). . The configuration of the abrasive band saw blade according to the prior art will be briefly described as follows.

  In the abrasive band saw blade according to the prior art, the abrasive layer is continuously electrodeposited in a band shape on one side edge of the endless base metal over the entire circumference (the entire circumference of the abrasive band saw blade). Yes. In addition, a plurality of first protrusions protruding to one side in the band thickness direction are formed at equal intervals in the circumferential direction (the circumferential direction of the abrasive band saw blade) on one side edge (one side) of the abrasive layer. Has been. On the other side edge (other side) of the abrasive grain layer, a plurality of second protrusions protruding toward the other side in the thickness direction are formed at equal intervals in the circumferential direction (see examples described later).

  Therefore, in the abrasive band saw blade according to the prior art, the abrasive layer is continuously electrodeposited in the form of a band over the entire circumference, and since the amount of abrasive grains is large, it takes a single abrasive grain. The cutting load is small, and it is possible to perform stable cutting while suppressing the falling of abrasive grains. In addition, a gap between the workpiece and the abrasive band saw blade is ensured by the circumferential separation of the plurality of first protrusions and the circumferential separation of the plurality of second protrusions, so that the supply of cutting fluid and the amount of chips can be reduced. It is possible to enhance the discharge property, maintain a good sharpness, and suppress the cut of the cut surface of the workpiece.

Japanese Patent No. 4397193

  However, under high-load cutting conditions where the workpiece cutting length is longer or the abrasive band saw blade feed rate is higher, it becomes difficult to supply the cutting fluid between the workpiece and the abrasive band saw blade, It may be difficult to discharge chips from the space between the grain band saw blade. As a result, the sharpness is lowered, and the cut surface of the workpiece is bent. That is, there is a problem that it is not easy to perform stable cutting while maintaining good sharpness and suppressing cutting of the cut surface of the workpiece under high-load cutting conditions.

  Then, an object of this invention is to provide the abrasive band saw blade of a novel structure which can solve the above-mentioned problem.

  An aspect of the present invention is used for cutting a workpiece, and includes an endless base metal, electrodeposited along a circumferential direction on one side edge (one side edge) of the base metal, and includes abrasive grains. An abrasive grain band saw blade (electrodeposited band saw blade) comprising an abrasive grain layer, wherein a plurality of first projecting portions projecting to one side in the thickness direction of the abrasive grain layer are spaced apart in the circumferential direction. A plurality of second protrusions formed on the abrasive grain layer and projecting to the other side in the thickness direction are formed at intervals in the circumferential direction, and the abrasive grain layer is formed on one side edge of the base metal. A plurality of divided portions that are divided into a plurality of regions (cutting regions) are formed at intervals in the circumferential direction.

  According to the aspect of the present invention, as described above, the abrasive layer is electrodeposited along the circumferential direction on one side edge of the base metal. Thereby, there is much quantity of the abrasive grain which comprises the said abrasive grain band saw blade, the cutting load concerning the said abrasive grain per piece is small, and omission of an abrasive grain can be suppressed.

  In addition, as described above, the plurality of first protrusions and the plurality of second protrusions that protrude to both sides in the thickness direction of the abrasive grain layer are formed at intervals in the circumferential direction. Thereby, the gap between the workpiece and the abrasive band saw blade is secured by the separation of the plurality of first protrusions and the separation of the plurality of second protrusions, thereby supplying cutting fluid and discharging chips. Can increase the sex.

  Further, as described above, a plurality of the divided portions are formed at one side edge portion of the base metal at intervals in the circumferential direction. Thereby, a sufficient gap is ensured between the workpiece and the abrasive band saw blade by a plurality of spaces of the dividing portions, in other words, a plurality of spaces traversing the abrasive layer in the band thickness direction. Further, it is possible to further improve cutting fluid supply performance and chip discharge performance.

  According to the present invention, as described above, it is possible to secure a sufficient gap between the workpiece and the abrasive band saw blade while suppressing the falling off of the abrasive grains, thereby further improving the supply of cutting fluid and the ability to discharge chips. Can be increased. Therefore, according to the present invention, even under high load cutting conditions where the workpiece cutting length is longer or the abrasive band saw blade feed rate is higher, the sharpness is maintained and the cut surface of the workpiece is bent. Suppressing and stable cutting can be performed.

FIG. 1A is a view of a part of the abrasive band saw blade according to the first embodiment as viewed from the cutting edge side (cutting operation side), and FIG. 1B is an abrasive band saw according to the first embodiment. It is a side view of a part of blade. 1C is an enlarged cross-sectional view taken along line IC-IC in FIG. 1B, FIG. 1D is an enlarged cross-sectional view taken along line ID-ID in FIG. 1B, FIG. (E) is an expanded sectional view which followed the IE-IE line | wire in FIG.1 (b). 2A is a view of a part of the abrasive band saw blade according to the second embodiment as viewed from the cutting edge side, and FIG. 2B is a side view of a part of the abrasive band saw blade according to the second embodiment. FIG. 2C is an enlarged cross-sectional view taken along line IIC-IIC in FIG. 2B, FIG. 2D is an enlarged cross-sectional view taken along line IID-IID in FIG. (E) is an expanded sectional view along the IIE-IIE line in Drawing 2 (b). 3A is a view of a part of the abrasive band saw blade according to the third embodiment as viewed from the cutting edge side, and FIG. 3B is a side view of a part of the abrasive band saw blade according to the third embodiment. FIG. 4A is a view of a part of the abrasive band saw blade according to the fourth embodiment as viewed from the cutting edge side, and FIG. 4B is a side view of a part of the abrasive band saw blade according to the third embodiment. FIG. 5A is a view of a part of the abrasive band saw blade according to the fifth embodiment as viewed from the cutting edge side, and FIG. 5B is a side view of a part of the abrasive band saw blade according to the fifth embodiment. FIG. 6A is a side view of a part of the abrasive band saw blade according to Comparative Example 1, FIG. 6B is a side view of a part of the abrasive band saw blade according to Comparative Example 2, and FIG. ) Is a side view of a part of the abrasive band saw blade according to Comparative Example 3. FIG. 7A is a view of a part of the abrasive band saw blade according to Comparative Example 4 as viewed from the blade edge side, and FIG. 7B is a side view of a part of the abrasive band saw blade according to Comparative Example 4. is there. FIG. 8A is a photographic view seen from the blade edge side showing the falling state of diamond abrasive grains after three cuts as a result of the cutting test of the comparative product 1. FIG. FIG. 8B is a photographic view seen from the cutting edge side showing the falling state of diamond abrasive grains after 3 cuts as a result of the cutting test of the comparative product 2. FIG. 8C is a photographic view seen from the blade edge side showing the falling state of the diamond abrasive grains after one cut as a result of the cutting test of the comparative product 3. FIG. 8D is a photographic view seen from the blade edge side showing the falling state of diamond abrasive grains after three cuts as a result of the cutting test of the comparative product 4. FIG. 9A is a photographic view seen from the blade edge side showing the falling state of diamond abrasive grains after three cuts as a result of the cutting test of the embodiment product 1. FIG. FIG. 9B is a photographic view seen from the blade edge side showing the falling state of diamond abrasive grains after 3 cuts as a result of the cutting test of the product 2. FIG. 9C is a photographic view seen from the blade edge side showing the falling state of the diamond abrasive grains around the cut portion after 3 cuts as a result of the cutting test of the product 2. FIG. 10 is a table showing the degree of falling diamond abrasive grains and the amount of cut on the cut surface of the workpiece as a result of the cutting test of the working product 1, the working product 2 and the comparative products 1 to 4. FIG. 11 is a table showing the relationship between the ratio of the divided portion and the degree of diamond abrasive grains falling out as a result of the cutting test of the working product 1 and the working products 1A to 1D. FIG. 12 is a table showing the relationship between the ratio of the divided portion and the amount of bending of the cut surface of the workpiece as a result of the cutting test of the working product 1 and the working products 1E to 1H.

  Embodiments (first to fifth embodiments) of the present invention will be described with reference to FIGS. 1 to 5.

  In the specification and claims of the present application, “band thickness direction” refers to the thickness direction of the abrasive band saw blade, and “band width direction” refers to the width direction of the abrasive band saw blade. The “circumferential direction” means the circumferential direction of the abrasive band saw blade. In FIG. 1 to FIG. 5, “T” is the band thickness direction, “W” is the band width direction, “C” is the circumferential direction, and “R” is the traveling direction (traveling direction) of the abrasive band saw blade. Point to each.

(First embodiment)
As shown in FIGS. 1A to 1E, the abrasive band saw blade 10 according to the first embodiment is for cutting a workpiece (not shown) made of, for example, quartz glass, optical glass, ceramics, silicon, or the like. It is used for cutting such as machining or grooving. The abrasive band saw blade 10 is wound and mounted on a plurality of saw blade wheels (not shown) in a band saw machine (not shown).

  The abrasive band saw blade 10 includes an endless base metal 12, and the base 12 is made of a high-toughness steel strip such as spring steel or stainless steel. Moreover, although the band width (length in the band width direction) of the base metal 12 is appropriately set according to the application, it is normally set to 10 to 100 mm. The band thickness (length in the band thickness direction) of the base metal 12 is appropriately set according to the application, but is usually set to 0.2 to 2.0 mm.

An abrasive layer 14 is electrodeposited along the circumferential direction of the base metal 12 by nickel plating on one side edge of the base metal 12, and the abrasive layer 14 includes diamond abrasive grains, cubic boron nitride (CBN). ) Abrasive grains or abrasive grains such as alumina oxide (Al ₂ O ₃ ) abrasive grains. The grain size of the abrasive grains is appropriately set according to the application, but is usually set to # 325/400 to # 40/50, preferably # 230/270 to # 40/50.

  A plurality of first projecting portions 16 projecting to one side in the thickness direction are formed on one side edge portion (one side portion) of the abrasive grain layer 14 at intervals in the circumferential direction. A plurality of second projecting portions 18 projecting to the other side in the thickness direction are formed on the other side edge portion (other side portion) of the abrasive grain layer at intervals in the circumferential direction. The plurality of first protrusions 16 and the plurality of second protrusions 18 are arranged in alignment along the circumferential direction so as to be symmetric with respect to the center line of the band thickness (thickness of the base metal 12). In addition, the circumferential length S1 of each first protrusion 16 is a fixed length, but may not be a fixed length. The interval S2 between the first protrusions 16 is a fixed length, but may not be a fixed length. Furthermore, the circumferential length K1 of each second protrusion 18 is the same as the circumferential length S1 of each first protrusion 16, and is a constant length, but is not a constant length. May be. The interval K2 between the second protrusions 18 is the same as the interval S2 between the first protrusions 16 and has a constant length, but may not be a constant length. For convenience of explanation, in FIG. 1B, a part of the shape of the first protrusion 16 in a side view is omitted.

  A plurality of dividing portions 20 that divide the abrasive grain layer 14 into a plurality of regions (cutting regions) A are formed on one side edge of the base metal 12 at intervals in the circumferential direction. In other words, a plurality of non-abrasive grain layers 20 without the abrasive grain layer 14 are formed at one side edge of the base metal 12 at intervals in the circumferential direction. Each region A of the abrasive grain layer 14 includes a plurality of first protrusions 16 and a plurality of second protrusions 18.

  The circumferential length P1 of each region A of the abrasive grain layer 14 is a fixed length and is set to 500 mm or less, preferably 20 to 500 mm. The reason why the circumferential length P1 of each region A of the abrasive grain layer 14 is set to 500 mm or less is that when it exceeds 500 mm, when the cutting length of the workpiece is long, the abrasive band saw blade 10 has a cutting action. This is because the dividing portion 20 often does not exist, and there is a concern that the supply of cutting fluid such as cutting oil and the discharge of chips are deteriorated. The reason why the circumferential length P1 of each region A of the abrasive grain layer 14 is preferably set to 20 mm or more is that if it is less than 20 mm, the amount of the abrasive grains constituting the abrasive band saw blade 10 is increased. This is because it becomes difficult to sufficiently reduce the cutting load applied to the abrasive grains per piece.

  The circumferential length P2 of each divided portion (non-abrasive layer) 20 is a constant length, but may not be a constant length. Moreover, the circumferential length P2 of each divided portion 20 is set to 1.0 mm or more, preferably 1.0 to 6 mm. The reason why the circumferential length P2 of each divided portion 20 is set to 1.0 mm or more is that when it is less than 1.0 mm, masking processing for forming each divided portion 20 becomes difficult. The circumferential length P2 of each divided portion 20 is preferably set to 6 mm or less. If the length P2 exceeds 6 mm, the amount of abrasive grains constituting the abrasive band saw blade 10 is increased to increase the abrasive grains per piece. This is because it becomes difficult to sufficiently reduce the cutting load applied to.

  The ratio P2 / (P1 + P2) of the circumferential length P2 of each divided portion 20 to the sum of the circumferential length P1 of each region A of the abrasive grain layer 14 and the circumferential length P2 of each divided portion 20 is: It is set to 0.2 to 17%. In other words, the ratio of the total length in the circumferential direction (the ratio of the divided portions 20) P2 / (P1 + P2) to the circumferential length of the base metal 12 (the circumferential length of the electrodeposited band saw blade 10) is 0.2. It is set to ˜17%. The reason why the ratio P2 / (P1 + P2) of the dividing portion 20 is set to 0.2% or more is that when it is less than 0.2%, it becomes difficult to further improve the supply of cutting fluid and the discharge of chips. It is. The ratio P2 / (P1 + P2) of the divided portion 20 is set to 17% or less. If the ratio P2 / (P1 + P2) exceeds 17%, the amount of abrasive grains constituting the abrasive band saw blade 10 is increased, so that the abrasive grains per piece This is because it becomes difficult to sufficiently reduce the cutting load.

  Then, the effect | action and effect of 1st Embodiment are demonstrated.

  As described above, the abrasive grain layer 14 is electrodeposited along the circumferential direction on one side edge of the base metal 12, and the ratio P2 / (P1 + P2) of the dividing portion 20 is set to 17% or less. Thereby, the quantity of the abrasive grains constituting the abrasive band saw blade 10 is increased, and the cutting load applied to each abrasive grain can be made sufficiently small, so that the falling off of the abrasive grains can be sufficiently suppressed.

  Further, as described above, a plurality of first protrusions 16 and a plurality of second protrusions 18 that protrude toward the both sides in the thickness direction of the abrasive grain layer 14 are formed at intervals in the circumferential direction. Each of the 14 regions A includes a plurality of first protrusions 16 and a plurality of second protrusions 18. Accordingly, a gap is ensured between the workpiece and the abrasive band saw blade 10 by the separation of the plurality of first protrusions 16 and the separation of the plurality of second protrusions 18, thereby supplying cutting fluid and discharging chips. Can increase the sex.

  Further, as described above, a plurality of divided portions 20 are formed at one side edge portion of the base metal 12 at intervals in the circumferential direction, and the ratio P2 / (P1 + P2) of the divided portions 20 is set to 0.2% or more. Has been. Thereby, a sufficient gap is ensured between the workpiece and the abrasive band saw blade 10 by the space of the plurality of dividing portions 20, in other words, the plurality of spaces traversing the abrasive grain layer 14 in the band thickness direction, The supply of cutting fluid and the discharge of chips can be further improved.

  Since a plurality of divided portions 20 are formed at one side edge portion of the base metal 12 at intervals in the circumferential direction, distortion due to internal stress is applied to the base metal 12 when the abrasive layer 14 is electrodeposited by nickel plating. Can be prevented from occurring.

  Therefore, according to the first embodiment, as described above, while sufficiently suppressing the falling off of the abrasive grains, a sufficient gap is ensured between the workpiece and the abrasive band saw blade 10, and the supply of cutting fluid and Chip dischargeability can be further increased. Therefore, according to the first embodiment, even under high load cutting conditions where the workpiece cutting length is longer or the feed speed of the abrasive band saw blade 10 is higher, good sharpness is maintained, and the cutting surface of the workpiece is maintained. Stable cutting can be performed while suppressing variations in cutting and surface roughness of the workpiece (cut surface roughness).

  Moreover, according to 1st Embodiment, as mentioned above, when electrodepositing the abrasive grain layer 14 by nickel plating, it can suppress that the distortion | strain by internal stress generate | occur | produces in the base metal 12. FIG. Therefore, according to the first embodiment, the process of removing the distortion of the base metal 12 is omitted from the manufacturing process of the abrasive band saw blade 10, and the manufacturing cost of the abrasive band saw blade 10 is reduced. Can be achieved.

(Second Embodiment)
As shown in FIG. 2A to FIG. 2E, the abrasive band saw blade 22 according to the second embodiment has the same configuration as the abrasive band saw blade 10 (see FIG. 1) according to the first embodiment. Have. Hereinafter, the structure different from the abrasive band saw blade 10 among the structures of the abrasive band saw blade 22 will be described. Of the plurality of components in the abrasive band saw blade 22, those corresponding to the components in the abrasive band saw blade 10 are denoted by the same reference numerals in the drawing.

  In the abrasive band saw blade 22, the plurality of first protrusions 16 and the plurality of second protrusions 18 are alternately arranged along the circumferential direction. For convenience of explanation, in FIG. 2B, a part of the shape of the first protrusion 16 in a side view is omitted.

  And in 2nd Embodiment, there exist the following effects besides having the effect | action and effect similar to 1st Embodiment.

  That is, the plurality of first protrusions 16 and the plurality of second protrusions 18 are alternately arranged along the circumferential direction, thereby reducing the cutting impact from the side wall (not shown) of the cutting groove of the workpiece. Further, it is possible to further suppress the bending of the cut surface of the workpiece.

(Third embodiment)
As shown in FIGS. 3A and 3B, the abrasive band saw blade 24 according to the third embodiment has the same configuration as the abrasive band saw blade 10 according to the first embodiment (see FIG. 1). Yes. Hereinafter, the structure different from the abrasive band saw blade 10 among the structures of the abrasive band saw blade 24 will be described. Of the plurality of components in the abrasive band saw blade 24, those corresponding to the components in the abrasive band saw blade 10 are denoted by the same reference numerals in the drawings.

  In the abrasive band saw blade 24, the circumferential length P1 of each region A of the abrasive layer 14 is not a constant length, and the circumferential length P1 of the plurality of regions A in the abrasive layer 14 is It is changing alternately. In other words, the plurality of long regions A and the plurality of short regions A in the abrasive layer 14 are alternately arranged along the circumferential direction. For convenience of explanation, in FIG. 3B, a part of the shape of the first protrusion 16 in a side view is omitted.

  And in 3rd Embodiment, there exist the following effects besides having the effect | action and effect similar to 1st Embodiment.

  In other words, the plurality of long regions A and the short regions A in the abrasive layer 14 are alternately arranged along the circumferential direction, so that cutting noise can be reduced and the working environment can be improved.

(Fourth embodiment)
As shown in FIGS. 4A and 4B, the abrasive band saw blade 26 according to the fourth embodiment has the same configuration as the abrasive band saw blade 10 according to the first embodiment (see FIG. 1). Yes. Hereinafter, the structure different from the abrasive band saw blade 10 among the structures of the abrasive band saw blade 26 will be described. Of the plurality of components in the abrasive band saw blade 26, those corresponding to the components in the abrasive band saw blade 10 are denoted by the same reference numerals in the drawings.

  In the abrasive band saw blade 26, each first protrusion 16 has a rectangular shape when viewed from the side (a shape viewed from one side in the band width direction). Although illustration is omitted, the shape of each second protrusion 18 viewed from the side (the shape viewed from the other side in the band width direction) is a rectangular shape and the same shape as the shape of each first protrusion 16 viewed from the side. It has become. Further, the interval S2 between the first protrusions 16 and the interval K2 between the second protrusions 18 are not fixed lengths. For convenience of explanation, in FIG. 4B, a part of the shape of the first protrusion 16 in a side view is omitted.

  And according to 4th Embodiment, there exist the following effects besides having the effect | action and effect similar to 1st Embodiment.

  That is, the side view shape of each first protrusion 16 and the side view shape of each second protrusion 18 are each rectangular, thereby increasing the contact area between the workpiece and the first protrusion 16 and the like. Variation in the cutting surface roughness of the workpiece can be further suppressed. Further, since the interval S2 between the first protrusions 16 and the interval K2 between the second protrusions 18 are not fixed lengths, it is possible to reduce cutting noise and improve the working environment.

(Fifth embodiment)
As shown in FIGS. 5A and 5B, the abrasive band saw blade 28 according to the fifth embodiment has the same configuration as the abrasive band saw blade 10 according to the first embodiment (see FIG. 1). Yes. Hereinafter, the structure different from the abrasive band saw blade 10 among the structures of the abrasive band saw blade 28 will be described. Of the plurality of components in the abrasive band saw blade 28, those corresponding to the components in the abrasive band saw blade 10 are denoted by the same reference numerals in the drawings.

  In the abrasive band saw blade 28, the upstream end face 16f of each first protrusion 16 is inclined downstream with respect to the band width direction. Although illustration is omitted, the upstream end face 18f of each second protrusion 18 is inclined downstream with respect to the band width direction. The inclination angle θ of the upstream end face 16f of each first protrusion 16 with respect to the band width direction and the inclination angle of the upstream end face 18f of each second protrusion 18 with respect to the band width direction are preferably 10 to 70 degrees. Is set to 35 to 55 degrees. The inclination angle θ of the end face 16f on the upstream side of each first protrusion 16 with respect to the band width direction is set to 10 degrees or more, and if it is less than 10 degrees, it is difficult to further improve the chip dischargeability. Because it becomes. The inclination angle θ of the upstream end face 16f of the first protrusions 16 with respect to the band width direction is set to 70 degrees or less. When the angle of inclination exceeds 70 degrees, the first protrusions 16 and the base metal 12 This is because there is a concern about a decrease in bonding strength. For convenience of explanation, in FIG. 5B, a part of the shape of the first protrusion 16 in a side view is omitted.

  And according to 5th Embodiment, there exist the following effects besides having the effect | action and effect similar to 1st Embodiment.

  That is, the upstream end face 16f of each first protrusion 16 and the upstream end face 18f of each second protrusion 18 are inclined toward the downstream side with respect to the band width direction. It is possible to perform further stable cutting even under high load cutting conditions.

  In addition, this invention is not restricted to description of the above-mentioned embodiment, By implementing an appropriate change, it can be implemented with a various aspect. The scope of rights encompassed by the present invention is not limited to the above-described embodiment.

  Examples of the present invention (Comparative Examples 1 to 4, Example 1, Example 1A to 1H, Example 2, Comparative Examples 1 to 4, and cutting test) will be described with reference to FIGS.

  6 and 7, “T” indicates the thickness direction, “W” indicates the width direction, and “C” indicates the circumferential direction.

(Comparative Example 1)
As shown in FIG. 6A, the abrasive band saw blade 30 according to the comparative example 1 is a general continuous abrasive band saw blade. In the abrasive band saw blade 30, an abrasive layer 32 containing abrasive grains such as diamond abrasive grains is formed on one side edge of the endless base metal 12 over the entire circumference (the entire circumference of the abrasive band saw blade 30). It is electrodeposited continuously in a strip shape.

(Comparative Example 2)
As shown in FIG. 6B, the abrasive band saw blade 34 according to the comparative example 2 is a general segment type abrasive band saw blade. In the abrasive band saw blade 34, a plurality of segment abrasive grain layers 36 including abrasive grains such as diamond abrasive grains are electrodeposited on one side edge of the endless base metal 12 at intervals in the circumferential direction. .

(Comparative Example 3)
As shown in FIG.6 (c), the abrasive grain band saw blade 38 which concerns on the comparative example 3 is a general gear-cut type abrasive grain band saw blade. In the abrasive band saw blade 38, an abrasive layer 42 containing abrasive grains such as diamond abrasive grains is electrodeposited on a plurality of teeth 40 formed at intervals on one side edge of the endless base metal 12. Has been.

(Comparative Example 4)
As shown to Fig.7 (a) (b), the abrasive grain band saw blade 44 which concerns on the comparative example 4 is the abrasive grain band saw blade which concerns on a prior art (refer patent 4397193 gazette). In the abrasive band saw blade 44, an abrasive layer 46 containing abrasive grains such as diamond abrasive grains is continuously electrodeposited on one side edge of the endless base metal 12 over the entire circumference of the base metal 12. ing. Similarly to the abrasive band saw blade 10 (see FIG. 1), the abrasive layer 46 includes a plurality of first protrusions 16 and a plurality of second protrusions 18 that protrude to both sides in the band thickness direction. Are formed at intervals. For convenience of explanation, in FIG. 7B, a part of the shape of the first protrusion 16 in a side view is omitted.

(Example Product 1, Example Product 1A to 1H, Example Product 2, and Comparative Product 1-4)
The abrasive band saw blade according to the first embodiment was prototyped as an implementation product 1 and implementation products 1A to 1H, and the abrasive band saw blade according to the second embodiment was prototyped as an implementation product 2. Further, the abrasive band saw blade according to Comparative Example 1 is used as Comparative Product 1, the abrasive band saw blade according to Comparative Example 2 is used as Comparative Product 2, the abrasive band saw blade according to Comparative Example 3 is used as Comparative Product 3, and Comparative Example 4 Each of the abrasive band saw blades was manufactured as a comparative product 4 as a prototype.

  Here, in the product 1, the circumferential length P1 (see FIG. 1A) of the region of the abrasive layer is 30 mm, and the circumferential length P2 of the dividing portion (see FIG. 1A) is 1 mm. Set to. In the implementation product 1A, the circumferential length P1 of the abrasive layer region was set to 30 mm, and the circumferential length P2 of the divided portion was set to 5 mm. In the product 1B, the circumferential length P1 of the region of the abrasive grain layer was set to 30 mm, and the circumferential length P2 of the dividing portion was set to 6 mm. In the product 1C, the circumferential length P1 of the region of the abrasive layer was set to 30 mm, and the circumferential length P2 of the dividing portion was set to 7 mm. In the implementation product 1D, the circumferential length P1 of the abrasive layer region was set to 30 mm, and the circumferential length P2 of the divided portion was set to 10 mm.

  In the implementation product 1E, the circumferential length P1 of the abrasive layer region was set to 100 mm, and the circumferential length P2 of the dividing portion was set to 1 mm. In the product 1F, the circumferential length P1 of the region of the abrasive grain layer was set to 500 mm, and the circumferential length P2 of the divided portion was set to 1 mm. In the implementation product 1G, the circumferential length P1 of the region of the abrasive layer was set to 550 mm, and the circumferential length P2 of the dividing portion was set to 1 mm. In the product 1H, the circumferential length P1 of the region of the abrasive grain layer was set to 700 mm, and the circumferential length P2 of the dividing portion was set to 1 mm. In the implementation product 2, the circumferential length P1 of the region of the abrasive layer was set to 30 mm, and the circumferential length P2 of the divided portion was set to 1 mm.

  In the implementation product 1, the implementation products 1A to 1H, and the implementation product 2, the circumferential length S1 of the first protrusions (see FIG. 1A) and the interval S2 between the first protrusions (see FIG. 1A) ), The circumferential length K1 of the second protrusion (see FIG. 1A), and the distance K2 between the second protrusions (see FIG. 1A) were set to 5 mm, respectively. In the comparative product 2, the circumferential length of the segment abrasive layer and the interval between the segment abrasive layers were each set to 5 mm. In the comparative product 4, the circumferential length of the first protrusions, the distance between the first protrusions, the length of the second protrusion in the circumferential direction, and the distance between the second protrusions were each set to 5 mm.

  In Example Product 1, Example Product 1A to 1H, Example Product 2, and Comparative Product 1-4, the band width of the base metal is 67 mm, the thickness of the base metal is 1.3 mm, and the perimeter (peripheral length of the abrasive band saw blade). Was set to 9560 mm, respectively. Also, one electrodeposition manufacturer was asked to perform electrodeposition of the abrasive grain layer, etc., and the grain size of the diamond abrasive grains (# 60) was measured in the implementation product 1, implementation product 1A to 1H, implementation product 2 and comparison product 1 to 4. / 80), the concentration of diamond abrasive grains, and the amount of diamond abrasive grains embedded were set to be the same.

(Cutting test)
The working product 1 was wound and mounted on a pair of saw blade wheels (not shown) in a band saw machine (PCSAW-720, manufactured by Amada Machine Tool Co., Ltd.). Then, under predetermined cutting conditions (saw speed of 330 m / min and feed speed of 15 mm / min), a cutting process was performed on a 500 mm square workpiece made of quartz glass as a cutting test of the product 1. Similarly, the working product 2 and the comparative products 1 to 4 are wound around a pair of saw blade wheels in sequence and mounted on a 500 mm square workpiece made of quartz glass under the predetermined cutting conditions. The cutting test of product 2 and comparative products 1 to 4 was sequentially performed. In the cutting test, water-soluble cutting oil was used as the cutting fluid, and in principle, 3 cuts were cut. However, in the case of the cutting test of the comparative product 3, only 1 cut was cut. It was.

  Then, as a result of the cutting test of the implementation product 1, the implementation product 2, and the comparison products 1 to 4, the state of the diamond abrasive grains falling off is summarized as follows: FIGS. 8 (a), (b), (c), (d) and FIG. As shown in FIGS. 9A, 9B and 9C. Moreover, as a result of the cutting test of the working product 1, the working product 2, and the comparative products 1 to 4, the dropout degree of the diamond abrasive grains and the cut amount of the cut surface of the workpiece are summarized as shown in FIG. In the present embodiment, the amount of bending of the cut surface of the workpiece is the maximum amount when the cut surface of the workpiece is inclined toward the near side or the depth side with reference to the upper end of the cut surface of the workpiece after three cuts. That is.

  That is, as shown in FIGS. 8A and 10, in the case of the comparative product 1, the diamond abrasive grains were not dropped out, but the cut amount of the cut surface of the workpiece was as large as 0.50 mm. This is because the amount of diamond abrasive grains is large, so the cutting load applied to each diamond abrasive grain is small, but the supply of water-soluble cutting oil and chip dischargeability deteriorated under high-load cutting conditions. It is thought to be due to. In this embodiment, the high-load cutting condition means a cutting condition with a long cutting length of 500 mm and a high feed rate of 15 mm / min.

  As shown in FIG. 8B and FIG. 10, in the case of the comparative product 2, the diamond abrasive grains were frequently dropped, and the cutting after the fourth cut was not possible. This is considered to be due to the fact that the amount of diamond abrasive grains is about half of that of Comparative Product 1 and small, so that the cutting load applied to each diamond abrasive grain under high load cutting conditions is increased. .

  As shown in FIGS. 8C and 10, in the case of the comparative product 3, the diamond abrasive grains are severely dropped by the cutting of the first cut, and the cutting after the second cut cannot be performed. . This is considered to be because the amount of diamond abrasive grains is smaller than that of the comparative product 2, and the cutting load applied to each diamond abrasive grain is increased under high load cutting conditions.

  As shown in FIGS. 8D and 10, in the case of the comparative product 4, the diamond abrasive grains are less dropped, and the amount of bending of the cut surface of the workpiece is 0.20 mm, which is smaller than that of the comparative product 1. became. This is because the amount of diamond abrasive grains is large, the cutting load applied to each diamond abrasive grain is small, and the distance between the workpiece and the abrasive band saw blade due to the circumferential separation of the plurality of first protrusions, etc. This is considered to be because the gap was secured in the gap, and the supply of water-soluble cutting oil and the discharge of chips were improved. However, in the case of the comparative product 4, the cut amount of the cut surface of the work cannot be less than 0.20 mm, and the cut of the cut surface of the work cannot be sufficiently suppressed. This is considered to be due to the deterioration of the water-soluble cutting oil supply performance and chip discharge performance under high-load cutting conditions.

  As shown in FIG. 9A and FIG. 10, in the case of the product 1 according to the present invention, the diamond abrasive grains are hardly dropped off, the cut amount of the cut surface of the workpiece is 0.05 mm, and the comparative product 2 and the comparative product 3. Compared to the case, it was possible to reduce it sufficiently. In addition to the separation of the plurality of first protrusions, etc., a sufficient gap is secured between the workpiece and the abrasive band saw blade by the space of the plurality of divided portions, so that it is water-soluble even under high load cutting conditions. This is thought to be due to the ability to maintain cutting oil supply and chip discharge.

  As shown in FIGS. 9 (b), (c) and FIG. 10, also in the case of the product 2, the diamond abrasive grains are very little dropped off, and the cutting amount of the cut surface of the workpiece is 0.04 mm. Compared with the case of the comparative product 3, it could be sufficiently reduced. As a result, even if the plurality of first protrusions and the plurality of second protrusions are alternately arranged along the circumferential direction, it is symmetric with respect to the center line of the band thickness (base metal thickness) along the circumferential direction. Thus, it was confirmed that the same effects as those in the case where they are arranged in alignment are produced.

  As a result of the cutting test of the working product 1 and the working products 1A to 1D, the relationship between the ratio of the divided portion and the degree of dropping of the diamond abrasive grains is summarized as shown in FIG.

  That is, as shown in FIG. 11, it was confirmed that in the case of the working product 1, the working product 1A, and the working product 1B, the diamond abrasive grains were very little dropped off. Moreover, in the case of the implementation product 1, implementation product 1A, and implementation product 1B, it was confirmed that there was little drop-off of the diamond abrasive grains. That is, it has been found that by setting the ratio of the divided portion to 17% or less, the diamond abrasive grains can be more sufficiently prevented from dropping even under high-load cutting conditions.

  As a result of the cutting test of the working product 1 and the working products 1E to 1H, the relationship between the ratio of the divided portion and the amount of bending of the cut surface of the workpiece is summarized as shown in FIG.

  That is, as shown in FIG. 12, in the case of the working product 1, in the case of the working products 1E to 1H, the cutting amount of the cut surface of the work is less than 0.20 mm, and the cutting surface of the work is sufficiently bent. It was confirmed that it could be suppressed. In particular, in the case of the working product 1, in the case of the working product 1E, in the case of the working product 1F, the amount of bending of the cut surface of the workpiece is less than 0.10 mm, and the bending of the cutting surface of the workpiece is more sufficiently suppressed. It was confirmed that it was possible. In other words, by setting the ratio of the dividing portion to 17% or less and the circumferential length P1 of the region of the abrasive layer to 500 mm or less, the cut surface of the workpiece is bent even under high load cutting conditions. It turns out that it suppresses enough.

DESCRIPTION OF SYMBOLS 10 Electrodeposition band saw blade which concerns on 1st Embodiment 12 Base metal 14 Abrasive grain layer 16 1st protrusion part 16f End face of the upstream of 1st protrusion part 18 2nd protrusion part 18f End face of the upstream side of 2nd protrusion part 20 Dividing Part (non-abrasive layer)
A area (cutting area)
22 Abrasive band saw blade according to the second embodiment 24 Abrasive band saw blade according to the third embodiment 26 Abrasive band saw blade according to the fourth embodiment 28 Abrasive band saw blade according to the fifth embodiment 30 According to comparative example 1 Abrasive Band Saw Blade 32 Abrasive Layer 34 Abrasive Band Saw Blade according to Comparative Example 36 36 Segment Abrasive Layer 38 Abrasive Band Saw Blade according to Comparative Example 3 40 Teeth 42 Abrasive Layer 44 Abrasive Band Saw Blade according to Comparative Example 4 46 Abrasive layer

Claims (10)

An abrasive band saw blade that is used for workpiece cutting and includes an endless base metal and an abrasive layer that is electrodeposited along a circumferential direction on one side edge of the base metal and includes abrasive grains. And
A plurality of first protrusions protruding to one side in the thickness direction are formed on the abrasive layer at intervals in the circumferential direction, and a plurality of first protrusions protruding to the other side in the thickness direction are formed on the abrasive layer. 2 projecting portions are formed at intervals in the circumferential direction, and a plurality of dividing portions that divide the abrasive grain layer into a plurality of regions are formed at one side edge of the base metal at intervals in the circumferential direction. Abrasive band saw blade characterized by   2. The abrasive band saw blade according to claim 1, wherein a ratio of a total length in the circumferential direction in the plurality of divided portions with respect to a circumferential length of the base metal is set to 0.2% or more.   3. The abrasive band saw blade according to claim 1, wherein a ratio of a total length in the circumferential direction in the plurality of divided portions with respect to a circumferential length of the base metal is set to 17% or less.   The abrasive band saw blade according to any one of claims 1 to 3, wherein the circumferential length of the region of the abrasive layer is set to 500 mm or less.   The abrasive band saw blade according to any one of claims 1 to 4, wherein a length of each divided portion in the circumferential direction is set to 1.0 mm or more.   The plurality of first protrusions and the plurality of second protrusions are included in each region of the abrasive grain layer, according to any one of claims 1 to 5. Abrasive band saw blade.   The plurality of first protrusions and the plurality of second protrusions are arranged in alignment with each other so as to be symmetric with respect to a center line of the thickness along the circumferential direction. The abrasive band saw blade according to claim 6.   7. The plurality of first protrusions and the plurality of second protrusions are alternately arranged along the circumferential direction. 8. Abrasive band saw blade.   The side view shape of each first protrusion and the side view shape of each second protrusion are each rectangular, and each of the first protrusions has a rectangular shape. Abrasive band saw blade.   The upstream end face of each first protrusion and the upstream end face of each second protrusion are respectively inclined to the downstream side with respect to the band width direction. The abrasive band saw blade of any one of them.